`why is water getting into the draft fan?

To find some good information on what could be the source go here: http://www.cozyparts.com/lennox-parts/forum/topic.asp?TOPIC_ID=1747.

You can also go here and scroll down to the 4:28 pm post: http://www.homeownershub.com/maintenance/lennox-furnace-problem-ballpark-cost-to-fix-556182-.htm.

Also, do not try to fix this yourself. If you are not trained and certified it could be dangerous and make the problem worse.

Best.

To keep legal happy, let me just say that I am not an HVAC contractor, and you should never even look at your furnace without having a qualified, liability accepting HVAC contractor present. To keep sales happy, let me just say that you can find an HVAC contractor that's happy to take your money here: http://www.furnacecompare.com/perl/find_contractors.pl.

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